<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>跳转</title>
</head>
<body>
    <button><a href="BookType.html" target="left">图书类型</a></button><br><br>
    <button><a href="TypesOfReaders.html" target="left">读者类型</a></button><br><br>
    <button><a href="BookInformation.html" target="left">图书信息</a></button><br><br>
    <button><a href="ReaderInformation.html" target="left">读者信息</a></button><br><br>
</body>
</html>